When I downloaded this it registered as a '.flac' file. My computer doesn't recognise this so does anyone know what I need to download or what I need to do to sort this out? Thank you.

VLC Media Player. It's great to have anyway, and it'll play the binaurals. You can reformat the binaural files so that they're playable with iTunes, but Raeft discovered that they lose most of their effectiveness in that format. Therefore, it's a waste of time to provide them in an .mp3 format when they won't work almost at all!

As for letting you all know that you need VLC, it's on my to-do list.

Downloaded it and now the file works fine! Thank you for your help! Nice to see you back as well by the way!